In a nutshell, grind any stray beans till the hopper and burr area is completely empty. Lower both Macro and Micro arms. Remove the hopper. Use the upper burr removal tool to remove the upper burr. Thoroughly clean the upper burr of all grind and schmutz. set aside. With a small slotted screw driver, remove the 3 screws holding the lower burr in place. Remove the screws and carefully remove the lower burr. You have to wiggle or pry under gently a bit. If you've never done this, there may be copious amounts of compressed fines and goo under that burr. Clean the lower burr using the brush included with the grinder. Using compressed air, at a distance of about 6", spray into the burr area to remove the debris. Should make a holy mess! No one ever side home coffee was neat! LOL Now, with the inside of the grinder clean, manually...and gently raise and lower both Micro and Macro arms up and down several times. You may also, at a distance spray some compressed in there to clear any debris that might be hiding in there. For now, leave the arms fully downward.
When that is done, replace the lower burr, making sure not to fully torque 1 screw than the next. Try to do it equally in steps. Tighten them, but don't or torque them. Next, replace the upper burr. using the tool. Follow the manual's instructions to not over torque. Replace the hopper, being careful to make sure the "nibs" are aligned to their corresponding cutaways. Once the hopper 'click" has occurred, I'd recommend another calibration with the 2mm tool. You won't be that far off, but if there was significant junk under you lower burr, I can pretty much assure you that your calibration changed a wee bit, to the COARSER. Maybe as much as 3-4 Micro clicks.
NOTE: If it's not asking too much, could one of the Moderators consider posting this as a "sticky?" I've probably submitted this sort of posting (by request), or a variation numerous times.
True. I might add the Preciso does that function even better. A nice compromise is the Virtuoso with the Preciso burr set. That said, there is NO reason the Vario can't do both, and did for me very well. Just remember to purge the grinder when going in either direction...with the grinder running when going finer, IF beans are present in the hopper.
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